It can't have been that important or it'd be backed up 
Thought of another one, although it wasn't me... we were migrating from our old EVA san to a nice shiney new 3par when someone (my boss, the IT manager
) decides to delete the san volume, thinking everything was off it. Everything was, except the vcentre server which hadn't finished migrating :rolleyes Thankfully the database was on a different server so it wasn't hard to build up another one, but it was a pain in the arse for it to happen an hour before I was going home.
Thought of another one, although it wasn't me... we were migrating from our old EVA san to a nice shiney new 3par when someone (my boss, the IT manager
) decides to delete the san volume, thinking everything was off it. Everything was, except the vcentre server which hadn't finished migrating :rolleyes Thankfully the database was on a different server so it wasn't hard to build up another one, but it was a pain in the arse for it to happen an hour before I was going home.